/* FLI file parser for the MPlayer program by Mike Melanson */ #include #include #include #include "config.h" #include "mp_msg.h" #include "help_mp.h" #include "stream.h" #include "demuxer.h" #include "stheader.h" typedef struct _fli_frames_t { int num_frames; int current_frame; off_t *filepos; unsigned int *frame_size; } fli_frames_t; // return value: // 0 = EOF or no stream found // 1 = successfully read a packet int demux_fli_fill_buffer(demuxer_t *demuxer){ fli_frames_t *frames = (fli_frames_t *)demuxer->priv; sh_video_t *sh_video = demuxer->video->sh; // see if the end has been reached if (frames->current_frame == frames->num_frames) return 0; // fetch the frame from the file // first, position the file properly since ds_read_packet() doesn't // seem to do it, even though it takes a file offset as a parameter stream_seek(demuxer->stream, frames->filepos[frames->current_frame]); ds_read_packet(demuxer->video, demuxer->stream, frames->frame_size[frames->current_frame], frames->current_frame/sh_video->fps, frames->filepos[frames->current_frame], 0 /* what flags? -> demuxer.h (alex) */ ); // get the next frame ready frames->current_frame++; return 1; } demuxer_t* demux_open_fli(demuxer_t* demuxer){ sh_video_t *sh_video = NULL; fli_frames_t *frames = (fli_frames_t *)malloc(sizeof(fli_frames_t)); int frame_number; int speed; unsigned int frame_size; int magic_number; // go back to the beginning stream_reset(demuxer->stream); stream_seek(demuxer->stream, 0); demuxer->movi_start = 128; demuxer->movi_end = stream_read_dword_le(demuxer->stream); #if 0 // skip the magic number stream_skip(demuxer->stream, 2); #else magic_number = stream_read_word_le(demuxer->stream); if ((magic_number != 0xAF11) && (magic_number != 0xAF12)) { mp_msg(MSGT_DEMUX, MSGL_ERR, "Bad/unknown magic number (%04x)\n", magic_number); return(NULL); } #endif // fetch the number of frames frames->num_frames = stream_read_word_le(demuxer->stream); frames->current_frame = 0; // allocate enough entries for the indices frames->filepos = (off_t *)malloc(frames->num_frames * sizeof(off_t)); frames->frame_size = (int *)malloc(frames->num_frames * sizeof(int)); // create a new video stream header sh_video = new_sh_video(demuxer, 0); // make sure the demuxer knows about the new video stream header // (even though new_sh_video() ought to take care of it) demuxer->video->sh = sh_video; // make sure that the video demuxer stream header knows about its // parent video demuxer stream (this is getting wacky), or else // video_read_properties() will choke sh_video->ds = demuxer->video; // custom fourcc for internal MPlayer use sh_video->format = mmioFOURCC('F', 'L', 'I', 'C'); sh_video->disp_w = stream_read_word_le(demuxer->stream); sh_video->disp_h = stream_read_word_le(demuxer->stream); // skip the video depth and flags stream_skip(demuxer->stream, 4); // get the speed speed = stream_read_word_le(demuxer->stream); if (speed == 0) speed = 1; #if 0 if (magic_number == 0xAF11) speed *= 1000/70; #endif sh_video->fps = 1000 / speed; sh_video->frametime = 1/sh_video->fps; // build the frame index stream_seek(demuxer->stream, demuxer->movi_start); frame_number = 0; while ((!stream_eof(demuxer->stream)) && (frame_number < frames->num_frames)) { frames->filepos[frame_number] = stream_tell(demuxer->stream); frame_size = stream_read_dword_le(demuxer->stream); magic_number = stream_read_word_le(demuxer->stream); stream_skip(demuxer->stream, frame_size - 6); // if this chunk has the right magic number, index it if (magic_number == 0xF1FA) { frames->frame_size[frame_number] = frame_size; frame_number++; } } // save the actual number of frames indexed frames->num_frames = frame_number; demuxer->priv = frames; return demuxer; }